September 19, 2011, 6:20PM

Campbell, the former chief of staff to Timothy Cahill, was also indicted by a special statewide grand jury on “contribution laundering” charges stemming from allegations that Campbell intentionally disguised campaign donations to Cahill’s 2010 gubernatorial campaign by giving money to family and friends and asking them to write checks to the campaign. Full story »

September 28, 2011, 10:26AM

Former Massachusetts Probation Commissioner John O'Brien enters the courtroom for his arraignment in Suffolk Superior Court in Boston, Monday. O'Brien pleaded not guilty to a charge of conspiring with another state official, Scott Campbell, a top aide to former state treasurer Timothy Cahill, to get O'Brien's wife a job at the state lottery. (Photos by Ted Fitzgerald, pool)

September 28, 2011, 10:26AM

Former Massachusetts Probation Commissioner John O'Brien, center, appears for his arraignment in Suffolk Superior Court in Boston, Monday. He pleaded not guilty to a charge of conspiring with another state official, Scott Campbell, a top aide to former state treasurer Timothy Cahill, to get O'Brien's wife a job at the state lottery.

September 28, 2011, 10:26AM

Former probation commissioner John OâBrien is arraigned before a clerk-magistrate in Suffolk Superior Court on charges that he traded political donations to former state treasurer Timothy P. Cahill in exchange for a job for OâBrienâs wife.

February 24, 2012, 10:20AM

A judge has vacated 11 promotions made by the disgraced former commissioner of the Massachusetts Probation Department and ruled that an arbitrator should determine whether the most qualified candidates were selected for the jobs dating to 2003. Full story »

May 10, 2012, 11:20AM

July 18, 2012, 8:28AM

Two one-time top aides to the former Massachusetts probation commissioner facing corruption charges for overseeing what authorities called a rigged hiring process have been granted immunity from prosecution in exchange for testifying against their ex-boss in federal and state corruption investigations. Full story »

September 18, 2012, 8:10AM

An arbitrator has ordered the state Probation Department to reopen 10 jobs after determining that former leaders of the agency improperly promoted less qualified, but politically connected candidates. Full story »

April 16, 2013, 8:33PM

John O’Brien was accused of conspiring to get his employees to attend a fundraiser benefiting former state Treasurer Tim Cahill in order to land O’Brien’s wife a job at the lottery commission Cahill oversaw. Full story »